<?php
/**
 * Scheduled jobs: daily scan, hourly traffic cleanup.
 *
 * @package GoConsent
 */

namespace GoConsent;

use GoConsent\Compliance\ConsentLog;
use GoConsent\Compliance\Report;
use GoConsent\Scanner\Scanner;
use GoConsent\Traffic\Store;

defined( 'ABSPATH' ) || exit;

/**
 * Registers and runs cron jobs.
 */
class Cron {

	const SCAN    = 'goconsent_daily_scan';
	const SCAN_1X = 'goconsent_scan_once';
	const CLEANUP = 'goconsent_hourly_cleanup';

	/**
	 * Scanner.
	 *
	 * @var Scanner
	 */
	private $scanner;

	/**
	 * Report.
	 *
	 * @var Report
	 */
	private $report;

	/**
	 * Traffic.
	 *
	 * @var Store
	 */
	private $traffic;

	/**
	 * Constructor.
	 *
	 * @param Scanner $scanner Scanner.
	 * @param Report  $report  Report.
	 * @param Store   $traffic Traffic store.
	 */
	public function __construct( Scanner $scanner, Report $report, Store $traffic ) {
		$this->scanner = $scanner;
		$this->report  = $report;
		$this->traffic = $traffic;
	}

	/**
	 * Hook jobs.
	 */
	public function register() {
		add_action( self::SCAN, array( $this, 'scan' ) );
		add_action( self::SCAN_1X, array( $this, 'scan' ) );
		add_action( self::CLEANUP, array( $this->traffic, 'cleanup' ) );
		add_action( 'init', array( $this, 'ensure_scheduled' ) );
		add_action( 'goconsent_setting_updated', array( $this, 'on_setting' ), 10, 1 );
	}

	/**
	 * Run a scan and rebuild the report.
	 */
	public function scan() {
		if ( ! ( new Terms() )->accepted() ) {
			return;
		}
		delete_option( 'goconsent_scan_pending' );
		$this->scanner->run();
		$this->report->rebuild( true );
		ConsentLog::cleanup();
	}

	/**
	 * Keep schedules in place; run the first scan shortly after activation.
	 */
	public function ensure_scheduled() {
		// No background work, and no requests of any kind, until an administrator accepts the terms.
		if ( ! ( new Terms() )->accepted() ) {
			if ( wp_next_scheduled( self::SCAN ) || wp_next_scheduled( self::SCAN_1X ) || wp_next_scheduled( self::CLEANUP ) ) {
				self::unschedule();
			}
			return;
		}
		self::schedule();
		if ( get_option( 'goconsent_scan_pending' ) && ! wp_next_scheduled( self::SCAN_1X ) ) {
			wp_schedule_single_event( time() + 10, self::SCAN_1X );
		}
	}

	/**
	 * Settings that change what the scanner sees trigger a fresh scan.
	 *
	 * @param string $key Changed setting.
	 */
	public function on_setting( $key ) {
		if ( ! ( new Terms() )->accepted() ) {
			return;
		}
		if ( in_array( $key, array( 'block', 'enabled', 'privacy_page', 'local_fonts' ), true ) && ! wp_next_scheduled( self::SCAN_1X ) ) {
			wp_schedule_single_event( time() + 5, self::SCAN_1X );
		}
	}

	/**
	 * Schedule recurring jobs.
	 */
	public static function schedule() {
		if ( ! wp_next_scheduled( self::SCAN ) ) {
			wp_schedule_event( time() + HOUR_IN_SECONDS, 'daily', self::SCAN );
		}
		if ( ! wp_next_scheduled( self::CLEANUP ) ) {
			wp_schedule_event( time() + 300, 'hourly', self::CLEANUP );
		}
	}

	/**
	 * Remove all jobs.
	 */
	public static function unschedule() {
		foreach ( array( self::SCAN, self::SCAN_1X, self::CLEANUP, \GoConsent\Frontend\LocalFonts::HOOK ) as $hook ) {
			wp_clear_scheduled_hook( $hook );
		}
	}
}